Merge commit '86cc97e55fe346502462284d2e636a2b3708163e' as 'Sources/OpenVPN3'

Sources/OpenVPN3/openvpn/http/validate_uri.hpp

@@ -0,0 +1,52 @@
+//    OpenVPN -- An application to securely tunnel IP networks
+//               over a single port, with support for SSL/TLS-based
+//               session authentication and key exchange,
+//               packet encryption, packet authentication, and
+//               packet compression.
+//
+//    Copyright (C) 2012-2017 OpenVPN Inc.
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Affero General Public License Version 3
+//    as published by the Free Software Foundation.
+//
+//    This program is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Affero General Public License for more details.
+//
+//    You should have received a copy of the GNU Affero General Public License
+//    along with this program in the COPYING file.
+//    If not, see <http://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <openvpn/common/exception.hpp>
+
+namespace openvpn {
+  namespace HTTP {
+    inline bool is_valid_uri_char(const unsigned char c)
+    {
+      return c >= 0x21 && c <= 0x7E;
+    }
+
+    inline bool is_valid_uri_char(const char c)
+    {
+      return is_valid_uri_char((unsigned char)c);
+    }
+
+    inline void validate_uri(const std::string& uri, const std::string& title)
+    {
+      if (uri.empty())
+	throw Exception(title + " : URI is empty");
+      if (uri[0] != '/')
+	throw Exception(title + " : URI must begin with '/'");
+      for (auto &c : uri)
+	{
+	  if (!is_valid_uri_char(c))
+	    throw Exception(title + " : URI contains illegal character");
+	}
+    }
+
+  }
+}